Vaadin: Opening a new window with PDF content placed in a String variable - string

Question

I'd like to open a new window with PDF content that is placed within a String variable.
I already have a button with an event connected. In this event I want to call the new window.
The method looks like this:
private void show_archivobjekt(String data) {
String pdf = anfrage.get_archivobjectdata(data);
System.out.println(pdf); // This shows my PDF content in console and works!
// How to convert this String into a StreamSource
StreamResource streamResource = new StreamResource(pdfss, "test.pdf", myView);
streamResource.setCacheTime(5000);
streamResource.setMIMEType("application/pdf");
myView.getMainWindow().open(streamResource, "_blank");
}
myView is the Application.
How can I convert the String pdf to a StreamSource (pdfss)? Do I have to save it as file at first or is it possible to convert it to a StreamSource directly in memory?
The console output shows me the typically PDF content starting with %PDF-1.3 ... and so on.
Any help would be appreciated. Thanks in advance!
Rainer

Answer 1

The answer to this question is available through the official support forum here: https://vaadin.com/forum#!/thread/148544
Simply create your StreamResource like this, by using the byte representation of your string to create a ByteArrayInputStream as the source:
StreamResource streamResource = new StreamResource(
new StreamResource.StreamSource() {
public InputStream getStream() {
return new ByteArrayInputStream(pdf.getBytes());
}
}, "test.pdf");